A comparison of the open and closed methods of anastomosis for colostomy closure.

A transverse colostomy was performed in dogs and, later, closed by resection and anastomosis. Half the anastomoses were done by the open and half by the closed method. The anastomoses were evaluated by barium enema series and by gross and microscopic examination. All anastomoses functioned well, but barium enema series showed great variation in the lumina diameter. Results of histologic studies revealed evidence of more inflammation and reaction about the open method.